This one is so confusing I need help with it so bad please. Multiple-Concept Example 8 reviews the approach that is used in problems such as this. A person eats a dessert that contains 210Calories. (This "Calorie" unit, with a capital C, is the one used by nutritionists; 1 Calorie = 4186 J. See Section 12.7.) The skintemperature of the person is 37 °C and that of her environment is 23 °C. The emissivity of her skin is 0.67 and its surface area is 1.2 m?.How many hours would it take her to emit a net radiant energy from her body that is equal to the energy contained in this dessert?Heat fromenvironmentToHeat fromperson

Radient energy E1 emmitted per second by an object having surface area A emmisitivity e and…

Answered: Multiple-Concept Example 8 reviews the…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter16: Temperature And The Kinetic Theory Of Gases

Section: Chapter Questions

Problem 11OQ

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The average coefficient of linear expansion of copper is 17 106 (C)1. The Statue of Liberty is 93 in tall on a summer morning when the temperature is 25C. Assume the copper plates covering the statue are mounted edge to edge without expansion joints and do not buckle or bind on the framework supporting them as the day grows hot. What is the order of magnitude of the statues increase in height? (a) 0.1 mm (b) 1 mm (c) 1 cm (d) 10 cm (e) 1 m
How long does it take the Sun to melt a block of ice at 0∘C∘C with a flat horizontal area 1.0 m2m2 and thickness 1.5 cmcm ? Assume that the Sun's rays make an angle of 41 ∘∘ with the vertical and that the emissivity of ice is 0.050.
The skin temperature of a nude person is 34.0∘C and the surroundings are at 20.5∘C. The emissivity of skin is 0.905, and the surface area of the person is 1.55 m2. What is the rate P at which energy radiates from the person?
A heated long cylindrical rod is placed in a cross flow of air at 20°C (1 atm) with velocity of 10 m/s. The rod has a diameter of 5 mm and its surface has an emissivity of 0.95. If the surrounding temperature is 20°C and the heat flux dissipated from the rod is 16000 W/m2, determine the surface temperature of the rod. Evaluate the air properties at 70°C.
A concerned mother is dressing her child for play in the snow. The child’s skin temperature is 34.0°C and the outside air temperature is1.5°C. If the emissivity of the child’s skin is 0.710 and he has 0.0115 m2 of exposed skin area, what is the amount of energy transferred from his body to the surroundings in 1.00 h?
A rectangular window in a home has a length of 1.5 m and a height of 0.80 m. If the window allows heat to escape from the home at a rate of 2,000 watts, how thick must the window be if the inside temperature of the home is 220 C and the outside temperature is 3.00C? (Assume that the coefficient of thermal conduction of glass is 0.80 W/mK.) a. 7.1 mm b. 124 mm c. 9.1 mm d. 8.1 mm e. 11 mm
picture window has dimensions of 1.65 m by 2.2 m and is made of glass 7.5 mm thick. On a winter day, the outside temperature is 24° C while the inside temperature is a comfortable at 17.5° C. (k of glass =0.145W/m.K) ((a*1.5)+(b*1.5)+(c*2.0) Calculate the following:a) the area of the window in square metres b) the temperature gradient (ΔT/Δx)in kelvin/metre c) the rate of heat lost through the window by conduction in watts/metre.kelvin
A ceramic mug is at a temperature of 343 K (about 160°F). The mug has a surface area of about 0.03 m2 and ceramic has an emissivity of about 0.9. If the ambient temperature of the room is 293 K (about 70°F), what is the net rate at which energy is lost from the mug by radiation?
A concerned mother is dressing her child for play in the snow. The child's skin temperature is 34.0°C, and the outside air temperature is 2.75°C. If the emissivity of the child's skin is 0.700 and he has 1.25 ✕ 10−2 m2 of exposed skin area, what is the amount of energy transferred from his body to the surroundings in 1.00 h?
An orange orb has an emissivity of 0.405 and its surroundings are at 324°C. The orange orb is absorbing heat via radiation at a rate of 640 W and it is emitting heat via radiation at a rate of 84 W. Determine the surface area of the orb, the temperature of the orb, & Pnet.
A concerned mother is dressing her child for play in the snow. The child’s skin temperature is 34.0 Celsius, and the outside air temperature is 1.5 Celsius. If the emissivity of the child’s skin is 0.710 and has 1.15E-2 m^2 of exposed skin area, what is the amount of energy transferred from his body to the surroundings in 1.00 hr?
A 60 kg patient suffers from hyperthermia, having a mean body temperature of 41 °C. The patient is placed in a bath containing 50 kg of water. The speciﬁc heat capacity of the water is 4.19 kJ kg−1 K−1 and the average speciﬁc heat capacity of the patient is 3.49 kJ kg−1 K−1. In order for the ﬁnal temperature of the water and patient to be 37 °C, what should the initial temperature of the water be?

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